Improvement in the manufacture of ink



UNITED STATES JAMES SANGS'IER, AMOS W. SANGSTER NEW YORK, ASSIGNORS TOTHEMSE (JONROY, OF SAME PLACE.

PATENT OFFICE.

AND WM. H. SANGSTER, or BUFFALO, LVES, HUGH SANGSTER, AND THOS. J.

Specification forming part of Letters Patent No. 53,379, dated March 20,1866; antedated March 5, 1866.

To all whom it may concern:

Be it known that we, JAMEs SANGsrER, AMos W. SANGSTER, and WILLIAM H.SANG- STER, of the city of Buffalo, in the county of Erie and State ofNew York, have discovered a new and useful Combination of Materials forPrinters Ink; and We hereby declare that the following descriptionthereof is sufliciently clear and exact to enable others skilled in theart to make and use our invention.

We manufacture our ink of pulverized mineral coal in combination withoil, soap, and rosin. Either of the mineral coals will answer, but theanthracite coal is preferred, as being the best and the blackest. Thebituminous coal will produce a brown color, which is not as good forprinting, but can be used for some kinds of paint.

We prepare our ink as follows: The coal is ground to a coarse powder ina cast-iron mill similar to a eoffeemill. It is then passed through amill such as is used in grinding wheat, and thereby reduced to a finepowder. The oil and rosin, with a small proportion of soap, are nowadded in. It is again passed through what is commonly known as apaintmill, and ground finely for use.

The materials used are mixed in about the following proportions: To sixquarts of oil add six pounds of rosin and one and three-quarters poundssoap. Rosin soap is preferred. They are well boiled together, afterwhich the pulverized coal is added in sufficient quantity to give thedesired blackness. of oil must be varied according to the season andclimate. In warm weather less oil and rosin are required in proportionto the coloringlnatter used than in cold weather.

What we claim as our invention, and desire to secure by Lettersv Patent,is

A new and useful discovery of a combination of pulverized mineral coalwith rosin, soap, and oil, or their equivalents, and the productionthereby of a cheap compound to be used as ink for printing.

JAMES SANGSTER. AMOS W. SANGSTER. WILLIAM H. SANGSTER.

Witnesses:

Tnos. J. OONRY, N. MENAAR.

The proportion

